Stitch-rubbing machine.



Patented Jan. 12, 1915.

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JOHN" B. HADAWAY, F SWAMPSCOTT, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERS EY'.

STITCH-RUBBING MACHINE;

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Application filed April 18, 1910.

To all whom it may concern:

Be itknown that I, J OHN B. HADAWAY, a citizen of the United States, residing at Swampscott, in the county of Essex and State of Massachusetts, have invented certain Improvements in Stitch-Rubbing Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference charactors on the drawings indicating like parts in the several figures.

This invention relates to stitch rubbing machines and particularly to a machine for rubbing the stitches in the channel of a shoe sole.

It is a common practice in the manufacture of shoes to form a channel around the margin of a shoe sole in which to place the line of stitches by which the outsole is socured to the other parts of the shoe. Before the stitching operation is begun the flap of the channel usually is turned upward into such a position that it will not interfere with the action of the stitching instrumentalities, and after the stitching operation is completed the flap is turned back and cemented down over the stitches to protect and conceal them. As the stitches occupy considerable space in the channel, it is frequently the case, particularly inthin soled shoes, that they prevent the channel flap from lying down smoothly and produce a ridge in the tread face of the sole extending around the entire margin. It has been proposed to obviate this difficulty by operating on the stitches in such a manner as to force them down into the stock even with the bed of the channel before the chan nel flap is turned down. This result may be effected by subjecting the stitches to the operation of a rotary tool having a fluted or serrated periphery which exerts a rubbing action on the stitches and'operates to embed them into the stock in the bottom of the channel. It requires considerable skill, however, to guide the shoe properly for the operation of such a tool, and an importantobject of this invention, therefore is to provide a stitch rubbing machine having means for guiding the shoe with reference to the tool as the latter operates around the sole.

Since the channel usually is formed closer to the edge of the sole along the forepart than in the shank, the guiding means and tool are so arranged that their relationship Specification of Letters Patent.

Patented Jan. 312, 1915.

Serial No. 556,167.

may be varied during operation to enable the tool to follow the channel. Preferably the guiding means is arranged for movement between two extreme positions, which are made to correspond to the maximum and minimum distances of the channel from the edge of the shoe sole so that when the guide is in one of its extreme positions, it will guide the shoe properly for the operation of the tool on the forepart and when it is in the other of its extreme positions, it will guide the shoe for operation in the shank.

The illustrated embodiment of the invention comprises a stitch rubbing tool and a gage cooperating therewith having a sole edge guiding roll located adjacent to the tool and a support for the roll which is arranged for movement between two adjustable stops, but is normally held against one of the stops by a spring.

Referring to the accompanying drawings, Figure 1 is a perspective view of a machine embodying the present invention; Fig. 2 is aside elevation of the stitch rubbing tool and gage showing the relative positions of these parts in operation upon the work; Fig. 3 is a front elevation of the tool and edge guiding roll; Fig. 1 shows in perspective a portion of a shoe with the stitches of the outseam lying in the channel of the out sole before being operated upon by the stitch rubbing tool; and Fig. 5 is a view similar to Fig. 4, but showing the stitches after they have been rubbed down by the too The post 2 is provided with suitable bearings to support the shaft 4 on which are mounted fast and loose pulleys 6 and 8 re spectively. The shaft may be rotated by a belt 10 running over the pulleys and a belt shifter 12 serves to throw the belt from one pulley to the other to start or stop the machine. The shaft at carries on its forward end a stitch rubbing tool 1 1 having a serrated or grooved periphery adapted to rub down and level off the stitches in the bottom of the channel; but any other suitably shaped tool. may be used. The tool may be secured to the shaft by a screw 16.

The gage or guiding device is supported by a bracket-like extension 16 projecting upwardly from the forward bearing of the frame 2 and curved toward the tool. Said extension carries at its forward end a pivot bolt 18 on which is fulcrumed a bell crank lever 20 having a rearwardly projecting horizontal arm 22 and two depending arms 24 that straddle the shaft 4. The arms 2% unite below the shaftl to form a short horizontal support for the edge guiding roll 26 which rotates on the screw 28. The arm 22 has an enlargement on its end which is bored vertically to receive an upright guide rod 30 that is secured in the frame 2.

A. spiral spring 32 surrounding the rod 30 bears against the upper side of the arm 22 of the bell crank 20 and abuts at its upper end against an adjusting screw 3% threaded on to the rod. This spring normally holds the arm 22 against the stop nuts 36 which are threaded on to the rod 30 below the arm and maybe adjusted to vary the normal position of the roll 26 with relation to the tool 14.

Movement of the edge guiding roll 26 away from the tool 1 is limited by an adjusting screw 38 threaded through a short arm 40 that projects horizontally from the bracket 16 over the arm 22. This screw is thus in position'to engage the upper side of the arm 22 to limit its movement about the pivot 18. A check nut 42 serves to hold the screw 38 in adjusted position.

In operation, the workman first adjusts the nuts 36 so that when the roll 26 is in its forward or normal position and the edge of the forepart is placed against the same, the line of stitches will come directly under the tool 1%. The screw 38 is then adjusted in such position that when the arm 22 is in engagement therewith, the roll 26 will be in position to guide the stitches in the shank under the tool 1%. The workman usually starts the rubbing operation at the heel seatend of the channel holding the shoe sole upward with the edge of the sole pressed firmly against the roll 26 so as to hold the arm 22 against the stop 38, as shown in Fig. 2. lnthis position he is afforded a rigid rest for the edge of the sole against which he may guide the shoe. The general appearance of the stitches before operation is indicated in Fig. 41. As the tool 14 rotates it rubs down or levels off the stitches even with the bottom'of the channel in much the manner indicated in Fig. 5. The workman feeds the shoe past the tool holding the gage in its innermost position'until the tool reaches the juncture of the shank and forepart.- He then relieves the pressure on the roll somewhat to permit the tool to follow the channel. The spring 32, however, holds the gage against the sole edge until the arm 22 strikes the stop 36 at which time the roll 26 is in position to guide the sole for the operation of the tool around the forepart. When the tool arrives at the shank on the other side of the sole, the workman presses the guide inwardly until the arm 22 strikes the stop 38, and'the roll is again positioned for guiding the sole for operation in the shank. This arrangement produces an effective guide for the sole during the entire operation and renders any particular degree of skill on the part of the operator unnecessary.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. A stitch rubbing machine comprising the combination with a tool constructed and arranged to rub the stitches in the channel of a shoe sole, of a gage for guiding the shoe as it is presented to the tool and means enabling the relation of the gage and tool to be varied during the operation of the tool on the work in accordance with the position of the channel in the sole.

2. A stitch rubbing machine comprising the combination with a tool constructed to rub the stitches in the channel of a shoe sole and means for operating the tool, of a gage for guiding the shoe as it is presented to said tool, said gage being so constructed and arranged that its relationship to the tool may be varied by the work to enable the tool to follow the channel, and means for determining the extreme positions of the gage relatively to the tool.

3. A stitch rubbing machine comprising the combination with a rotary tool constructed to rub down the stitches in the channel of a shoe sole, of an edge gage located adjacent'to said tool for positioning the sole for the operation of said tool, said gage being constructed and arranged to yield to enable the tool to follow the channel.

4. A stitch rubbing machine comprising the combination with a fluted rotary tool constructed and shaped to rub down the stitches in the channel of a shoe sole, of a movable edge gage, means for normally holding said gage in position to guide the sole during operation on the forepart, said means permitting the gage to move under pressure of the shoe, and means to positively limit said movement to hold the gage in position to guide the sole properly during the operation of the tool in the shank of the sole.

5. A stitch rubbing machine comprising the combination with a tool constructed and arranged to rub down the stitches in the channel of a shoe sole and embed them in the stock of the sole, of an edge gage positioned adjacent to said tool, said gage being arranged for movement during operation fluted tool mounted thereon constructed and shaped to rub down the stitches in the channel of a shoe sole, of a sole edge guiding device positioned adjacent to said tool, said device being arranged for movement during operation on the work between two extreme positions, adjustable means whereby said positions may be made to correspond tothe maximum and minimum distances of the channel from the edge of the shoe sole, and means for holding said guiding device normally in one of its extreme positions.

7. A stitch rubbing machine comprising the combination with a fluted stitch rubbing tool constructed to rub down the stitches in the channel of a shoe sole and a rotary shaft supporting said tool, of an edge guiding roll positioned adjacent to said tool, a support on which said roll is rotatably mounted, means acting directly on said support to urge said roll yieldingly toward said tool, adjustable means for engaging said support to limit the movement of said roll toward the tool, and additional adjustable means for engaging the support to limit the movement of said roll away from the tool.

8. A stitch rubbing machine comprising the combination with a fluted stitch rubbing tool constructed to rub down the stitches in the channel of a shoe sole and a rotary shaft supporting said tool, of an edge guiding roll positioned adjacent to said tool, a pivoted support for said roll whereby it may swing toward or from the tool, means for yieldingly forcing said roll toward the tool, and two independently adjustable stop devices arranged respectively to limit the movement of said guiding roll toward and from the tool.

9. A stitch rubbing machine comprising the combination with a shaft and a stitch rubbing tool mounted thereon, of an edge guiding roll positioned below said shaft and adjacent to the tool, a bell crank lever sup- Copies of this patent may be obtained for porting said roll, said lever being mounted on a pivot positioned above said shaft and extending at substantially right angles to the axis of the shaft, said lever having a rearwardly projecting arm, a spring abutting against the upper side of said lever, means for adjusting the tension of said spring, an adjustable screw arranged to engage the upper side of the arm to limit its movement in one direction about said pivot and an adjustable stop to engage the lower side pf said arm to limit its movement in the other direction about said pivot.

10. A stitch rubbing machine comprising the combination with a machine frame, a rotary shaft supported thereon, and a stitch rubbing tool mounted on said shaft, of a bracket carried by said frame, a pivot pin supported by said bracket above said shaft and extending at substantially right angles to the axis of the shaft, a bell crank lever fulcrumed on said pivot, said lever having a rearwardly projecting horizontal arm and two depending arms that straddle said shaft, said depending arms being united below the shaft to form a support, a sole edge guiding roll mounted on said support adjacent to the tool, a vertical guide rod cooperating with said horizontal arm, adjustable nuts threaded on to said rod below said arm in position to engage the arm, a spring surrounding said rod and bearing upon the upper side of said arm, an adjusting nut for varying the tension of said spring and an adjustable screw supported by said bracket in position to engage the upper side of said horizontal arm.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN B. HADAWVAY.

Witnesses:

CHESTER E. ROGERS, JOHN H. MCCREADY.

five cents each, by addressing the Commissioner of Patents,

WashingtomD. C. 

